The Greeks were philosophically concerned with a rational explanation of everything and saw the repetition of the golden ratio throughout the world and all levels of reality as a step towards this unifying theory. In short, it is the recognition that the same traits appear in entities of many different sizes, from one man to the entire human population.

Each man is a microcosm of the universe. Your body is made of all the elements of the world. Nature supplied all the ingredients that make your body, which means that the universe made you by donating itself. If nature demanded that you refund everything that nature loaned you, would there be anything left of you? You can feel that the universe gave you birth and made you, so nature is your first parent.